Observational evidence for self-interacting cold dark matter

  title={Observational evidence for self-interacting cold dark matter},
  author={Spergel and Steinhardt},
  journal={Physical review letters},
  volume={84 17},
Cosmological models with cold dark matter composed of weakly interacting particles predict overly dense cores in the centers of galaxies and clusters and an overly large number of halos within the Local Group compared to actual observations. We propose that the conflict can be resolved if the cold dark matter particles are self-interacting with a large… CONTINUE READING